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This required minimum asphalt content is based on the use of aggregate with a specific gravity of
2.65 to 2.70. The minimum asphalt content requirement may be adjusted when aggregate with a
higher specific gravity is used, or the minimum may be adjusted at the Engineer’s discretion if it
is believed to be in the best interest of the Department.

Hot Bituminous Pavement to be placed under NHDOT Section 401 “Method Requirements” (not
“QC/QA”).

Specific pavement mix and thickness for this contract shall be as specified in the Supplementary
Conditions or directed by the Engineer.

Testing:

Pavement testing will be completed by a testing agency selected by the City.

The Contractor shall furnish all materials, labor, equipment, and transportation necessary to take
loose asphalt samples, cut cores, and patch core hole as directed by the Engineer. Cores and
samples shall be delivered to a location in Nashua to be identified by the Engineer.

Cores shall be 6” in diameter and cut to the subbase. After core has been cut, contractor shall
thoroughly remove all water in the core hole, tack sides of core hole, fill hole with hot mix
asphalt, and compact until required densities are achieved. Contractor shall provide ice to cool
mix when ambient temperatures are high.

Contractor shall provide two container types. One shall be of sufficient size and quality to
contain 3 shovels full of asphalt. The other shall be of sufficient size and quality to contain a 6”
diameter core of varying thickness. Containers shall have an area for labeling.

Contractor and City shall agree to order of paving 24 hours prior to placement of mix. Paving
must be completed in a way that does not complicate tonnage tracking for identifying sample
locations. When directed by the Engineer, the Contractor shall pave an entire street or group of
streets before paving other streets.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed, compacted, sampled, and cored hot bituminous
pavement, machine method as approved by the Engineer. A price adjustment for liquid asphalt is
provided in this contract as outlined in Item 900 Liquid Asphalt Adjustment. No payment will be
made for materials delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Payment is
contingent upon submittal of quantities and delivery slips in a per street format.

Work and expenses associated with providing loose samples shall be incidental to this item.

Cores shall be measured and paid under Item 1010.9.

Page 7 of 42

ITEM 403.12 -HOT BITUMINOUS PAVEMENT, HAND METHOD
A. SCOPE

This work shall include paving using the hand method for driveways, curb patches, areas
between railroad crossings, areas where it is impractical to pave using machine method, as
shown on the plans, or as ordered by the Engineer. Hand method paving shall not be used where
machine method paving is required.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved NHDOT Sections 401, 403, and 411 as amended
herein.

All surface preparation shall be subsidiary to this item. The existing surface shall be thoroughly
dry and swept free of all dust, dirt and loose material (including winter sand).

A tack coat shall be applied immediately prior to placement of hot bituminous pavement. Tack
shall also be applied to every cold joint, and where directed by the Engineer. Tack is subsidiary.

Contractor shall use a 1 ton steel drum roller or heavier to achieve required compaction.

Asphalt mix design shall be the same as the wearing course unless otherwise specified by the
Engineer.

C. MEASUREMENT AND PAYMENT

This item will be paid per Ton of placed and compacted hot bituminous pavement, hand method
as approved by the Engineer. A price adjustment for Liquid Asphalt is provided in this contract
as outlined in Item 900 Liquid Asphalt Adjustment. No payment will be made for materials
delivered but not placed.

Contractor shall record the tons of material placed and compacted for each street. Payment is

contingent upon submittal of quantities in a per street format with respective station and offset
values.

Page 8 of 42

ITEM 403.6 - PAVEMENT JOINT ADHESIVE
A. SCOPE

This work includes the installation of pavement joint adhesive in locations as specified herein,
shown on the plans or as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved NHDOT Standard Specifications for Road and
Bridge Construction, Section 401.2.12. Joint adhesive will be required on all longitudinal joints
in wearing course pavement excluding driveway and side road tie-in joints. Joint adhesive must
be on the NHDOT Qualified Products List.

C. MEASUREMENT AND PAYMENT

This item will be measured per Linear Foot completed in place and as ordered by the Engineer in
the field. Payment for this item shall be at the contract unit price per Linear Foot. This payment
shall include all materials, labor, equipment, and all else needed to complete the work under this

item.

Contractor shall record the linear feet of material placed for each street. Payment is contingent
upon submittal of quantities in a per street format.

Page 9 of 42

ITEM 417 - COLD PLANING OF BITUMINOUS SURFACES
A. SCOPE

This work shall consist of the removal of existing bituminous pavement between road edges, to
the depth shown on the plans or as ordered by the Engineer. Maximum depth will vary from 1.5”
to 2”, depending upon the specific street treatment.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, or the latest approved NHDOT Standard Specifications for Road and Bridge
Construction. The most stringent specification shall apply.

The material removed from this operation shall remain the property of the City of Nashua and
shall be transported and stock piled by the contractor at the Four Hills Landfill at 830 West
Hollis St in Nashua.

If the road is to be open to traffic after cold planning, level changes shall be tapered by use of
asphalt fillets. Fillets shall be tapered at a rate of 1 FT per inch along longitudinal level changes
and at a rate of 1 FT per 2-inches along transverse level changes. All fillets shall be installed
flush with top of the existing asphalt surface and must be acceptable to the Engineer. The
Contractor shall be responsible for installing, maintaining and replacing all damaged fillets,
where necessary, until the wearing course 1s placed.

All raised catch basins and manholes shall be spray painted a florescent color around the top of
frames.

Raised structures greater than 2 inches shall be provided with asphalt fillets until the wearing
course is paved. The Engineer may direct the contractor to install fillets at other raised structures
at critical locations.

Fillets and spray painting of castings shall continue as needed or directed by the Engineer until
the top course of pavement is placed and are considered subsidiary to this item.

The Contractor shall prevent any materials from entering drainage structures from this operation
and shall clean out said structures as directed by the Engineer.

All catch basins shall be protected from millings by use of a silt sack. All materials, labor,
equipment, and transportation necessary to install, maintain, and remove the silt sacks and
dispose of collected material shall be subsidiary.

If directed, the Contractor shall furnish all materials, labor, equipment, and transportation

necessary to cut 6” cores to subbase prior to the start of cold planning. Contractor will be
responsible for adequately backfilling holes with hot mix asphalt.

Page 10 of 42

C. MEASUREMENT AND PAYMENT
This item shall be measured by the Square Yard of Cold Planing of Bituminous Surfaces.

Payment for this item shall be at the contract unit price per Square Yard. This payment shall also
include all materials, labor, equipment, and all else needed to complete the work under this item.

Contractor shall record the square yards of cold planed area for each street. Payment is
contingent upon submittal of quantities in a per street format.

Cores cut in accordance with specific direction from the Engineer in advance of cold planing
shall be measured and paid for under Item 1010.9 Asphalt Core.

Page 11 of 42

ITEM 417.20- COLD PLANING TRANSITIONS
A. SCOPE

This work shall consist of the removal of existing bituminous pavement the depth and limits
shown on the plans or as directed by the Engineer. Cold planning transitions are required to tie in
overlays with existing pavement.

For roadways which are being reclaimed this item shall only be used to pay for cold planing at
driveway tie-ins as directed by the Engineer.

For roadways which are being cold planed (milled) prior to overlay, this item shall only be used
to pay for cold planing at driveway tie-ins.

For roadways which are being overlaid without overall cold planing (milling), this item shall be
used to pay for cold planing at driveway transitions and for cold planing transitions to existing
roadway pavement at limits of work as directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, labor, equipment, and transportation necessary for
work in accordance with the latest approved City of Nashua Standard Specifications for Road
Construction, or the latest approved NHDOT Standard Specifications for Road and Bridge
Construction. The most stringent specification shall apply.

The Contractor shall prevent any materials entering drainage structures from this operation and
shall clean out said structures as directed by the Engineer.

The material removed from this operation shall remain the property of the City of Nashua and
shall be transported and stock piled by the contractor at the Four Hills Landfill at 830 West
Hollis St in Nashua.

If the road is to be open to traffic after cold planning, level changes shall be tapered by use of
asphalt fillets. Fillets shall extend a minimum of 2’ from level change, and be flush with top of
existing asphalt surface. Fillet construction must be acceptable to the Engineer. Fillets shall be
required until the wearing course is placed and shall be removed before each course of pavement
is installed.

All raised catch basins and manholes shall be spray painted a florescent color around the top of
frames.

Raised structures or driveways greater than 2 inches shall be provided with asphalt fillets until
the wearing course is paved. The Engineer may direct the contractor to install fillets at other

critical locations.

Fillets and spray painting of castings shall continue until the top course of pavement is placed
and are considered subsidiary to this item.

Page 12 of 42

C. MEASUREMENT AND PAYMENT

The accepted quantities of Cold Planing Transitions will be paid for by the Square Yard
measured in the field and approved by the Engineer. Contractor shall record the square yards of
cold planed transitions for each street. Payment is contingent upon submittal of quantities in a
per street format. This payment shall also include all materials, labor, equipment, and all else
needed to complete the work under this item.

Page 13 of 42

ITEM 603.82212 —- 12” POLYETHYLENE PIPE (TYPE S)

A.

SCOPE

This work shall consist of furnishing and installing polyethylene (PE) pipe type S, at the
locations shown on the plans or as ordered by the Engineer.

MATERIALS AND CONSTRUCTION

The Contractor shall furnish all materials, including the necessary joints, fittings, and
connections as required, labor and equipment necessary for the excavation, placement,
and joining of pipe in accordance with relevant provisions of Section 603 of the NHDOT
Standard Specifications for Road and Bridge Construction, latest edition. Sawed
pavement, common structure excavation to the depth specified in of Section 206.4.1 of
the NHDOT Standard Specifications for Road and Bridge Construction latest edition,
secondary excavation required in the imperfect trench method, bedding, shaping of
bedding, and backfill shall be included in this work.

MEASUREMENT AND PAYMENT

Pipe will be measured by the linear foot to the nearest foot. Measurement of circular pipe
will be made between the ends of the pipe along the central axis, including through
elbows and bends, as installed. No separate measurement will be made for elbows or
bends. Connection of the pipe to an existing drainage structure as directed by the
Engineer is incidental.

Page 14 of 42

ITEM 604.124 - CATCH BASIN

A. SCOPE

This work includes furnishing and installing a catch basin at locations shown on the plans or as
directed by the Engineer.

B. MATERIALS AND CONSTRUCTION

The contractor shall furnish all materials, labor, equipment, and transportation necessary to
complete the work in accordance with the latest approved City of Nashua Standard
Specifications for Road Construction, or the latest approved NHDOT Standard Specifications for
Road and Bridge Construction. The most stringent specification shall apply unless otherwise
directed by the Engineer.

Except as noted below for leaching type catch basins, catch basins shall be Type B — 4’ diameter.

Where directed by the Engineer, catch basin shall be a leaching type catch basin installed in
compliance with attached detail.

C. MEASUREMENT AND PAYMENT
Payment for Catch Basin shall be at the contract unit price specified for each location. This
payment shall include all materials, labor, equipment and all else needed to complete the work

under this item.

Leaching type catch basins shall be paid for at two hundred and fifty percent (250%) of the
contract unit price for Item 604.124.

Setting frame and grate shall be incidental.

Page 15 of 42

Technical Specifications — 2021 Paving Program Residential Roadways

Leaching Catch Basin Detail

SINGLE GRATE - 24° » 24° OPENING
DOUBLE GRATE - 24" « 40" OPENING

TOP SLAB [H-20 LOADING)

EE SPI FILTER FABRIC
| A SSS (MIRAF) 140M OR
A “ APPROVED EQUAL}

i CRUSHED STONE (COURSE)

NHOOT ITEM 204.6
[MIN

PERFORATION (TYP)
12 OF BOTH WAYS

1. BASE SHALL BE SOLID, SEDIMENT SHALL BE
REMOVED ON 4, REGULAR SCHEDULED BASIS
BY OVINER.

2. LOCATION OF DRAIN LINE OPENINGS VARY.
CORE TO JOB SPECIFICATIONS (SEE DRAIN
PROFILES).

3. STRUCTURE DESIGN AND REINFORCEMENT
SHALL CONFORM TO ASTM Ca? 6 ANID ATES.
CONCRETE SHALL BE 4000 PSI MINIMUM.

4. FILTER FABRIC MUST BE PLACED OVER

| CRUSHED STONE AND OVERLAP EXISTING

{ +4 br BLA 2-0" MATERIAL BY 12° TO PREVENT PAVEMENT
Fell. MIM. BASE COURSE MATERIALS FROM MIGRATING

INTO THE CRUSHED STONE.

LEACHING CATCH BASIN

NOT TO SCALE

3 M
2 te
th Th =
[aa a o
a Pf ..
Fo. ae .
=| 5 Oo ml * oat
om 2 ae & * (= : =
uu at
ala fu 5° ___— at PERFORATION
a — ST
whe ae & =
=| & “ NOT TO SCALE
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a

127 |

Page 16 of 42